Unverified Commit d4ecae56 authored by Laura Nao's avatar Laura Nao Committed by Stephen Boyd
Browse files

clk: mediatek: Add MT8196 mcu clock support 



Add support for the MT8196 mcu clock controller, which provides PLL
control for MCU.

Reviewed-by: default avatarNícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: default avatarLaura Nao <laura.nao@collabora.com>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 8f61d9d3

drivers/clk/mediatek/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -1017,6 +1017,13 @@ config COMMON_CLK_MT8196_IMP_IIC_WRAP 
	help

	  This driver supports MediaTek MT8196 i2c clocks.



config COMMON_CLK_MT8196_MCUSYS

	tristate "Clock driver for MediaTek MT8196 mcusys"

	depends on COMMON_CLK_MT8196

	default COMMON_CLK_MT8196

	help

	  This driver supports MediaTek MT8196 mcusys clocks.



config COMMON_CLK_MT8196_PEXTPSYS

	tristate "Clock driver for MediaTek MT8196 pextpsys"

	depends on COMMON_CLK_MT8196

drivers/clk/mediatek/Makefile

+1 −0
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@@ -154,6 +154,7 @@ obj-$(CONFIG_COMMON_CLK_MT8196) += clk-mt8196-apmixedsys.o clk-mt8196-topckgen.o 
				   clk-mt8196-topckgen2.o clk-mt8196-vlpckgen.o \

				   clk-mt8196-peri_ao.o

obj-$(CONFIG_COMMON_CLK_MT8196_IMP_IIC_WRAP) += clk-mt8196-imp_iic_wrap.o

obj-$(CONFIG_COMMON_CLK_MT8196_MCUSYS) += clk-mt8196-mcu.o

obj-$(CONFIG_COMMON_CLK_MT8196_PEXTPSYS) += clk-mt8196-pextp.o

obj-$(CONFIG_COMMON_CLK_MT8196_UFSSYS) += clk-mt8196-ufs_ao.o

obj-$(CONFIG_COMMON_CLK_MT8365) += clk-mt8365-apmixedsys.o clk-mt8365.o

drivers/clk/mediatek/clk-mt8196-mcu.c

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// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2025 MediaTek Inc.

 *                    Guangjie Song <guangjie.song@mediatek.com>

 * Copyright (c) 2025 Collabora Ltd.

 *                    Laura Nao <laura.nao@collabora.com>

 */

#include <dt-bindings/clock/mediatek,mt8196-clock.h>



#include <linux/clk.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>



#include "clk-mtk.h"

#include "clk-pll.h"



#define ARMPLL_LL_CON0	0x008

#define ARMPLL_LL_CON1	0x00c

#define ARMPLL_LL_CON2	0x010

#define ARMPLL_LL_CON3	0x014

#define ARMPLL_BL_CON0	0x008

#define ARMPLL_BL_CON1	0x00c

#define ARMPLL_BL_CON2	0x010

#define ARMPLL_BL_CON3	0x014

#define ARMPLL_B_CON0	0x008

#define ARMPLL_B_CON1	0x00c

#define ARMPLL_B_CON2	0x010

#define ARMPLL_B_CON3	0x014

#define CCIPLL_CON0	0x008

#define CCIPLL_CON1	0x00c

#define CCIPLL_CON2	0x010

#define CCIPLL_CON3	0x014

#define PTPPLL_CON0	0x008

#define PTPPLL_CON1	0x00c

#define PTPPLL_CON2	0x010

#define PTPPLL_CON3	0x014



#define MT8196_PLL_FMAX		(3800UL * MHZ)

#define MT8196_PLL_FMIN		(1500UL * MHZ)

#define MT8196_INTEGER_BITS	8



#define PLL(_id, _name, _reg, _en_reg, _en_mask, _pll_en_bit,	\

	    _flags, _rst_bar_mask,				\

	    _pd_reg, _pd_shift, _tuner_reg,			\

	    _tuner_en_reg, _tuner_en_bit,			\

	    _pcw_reg, _pcw_shift, _pcwbits) {			\

		.id = _id,					\

		.name = _name,					\

		.reg = _reg,					\

		.en_reg = _en_reg,				\

		.en_mask = _en_mask,				\

		.pll_en_bit = _pll_en_bit,			\

		.flags = _flags,				\

		.rst_bar_mask = _rst_bar_mask,			\

		.fmax = MT8196_PLL_FMAX,			\

		.fmin = MT8196_PLL_FMIN,			\

		.pd_reg = _pd_reg,				\

		.pd_shift = _pd_shift,				\

		.tuner_reg = _tuner_reg,			\

		.tuner_en_reg = _tuner_en_reg,			\

		.tuner_en_bit = _tuner_en_bit,			\

		.pcw_reg = _pcw_reg,				\

		.pcw_shift = _pcw_shift,			\

		.pcwbits = _pcwbits,				\

		.pcwibits = MT8196_INTEGER_BITS,		\

	}



static const struct mtk_pll_data cpu_bl_plls[] = {

	PLL(CLK_CPBL_ARMPLL_BL, "armpll-bl", ARMPLL_BL_CON0, ARMPLL_BL_CON0, 0,

	    0, PLL_AO, BIT(0), ARMPLL_BL_CON1, 24, 0, 0, 0, ARMPLL_BL_CON1, 0, 22),

};



static const struct mtk_pll_data cpu_b_plls[] = {

	PLL(CLK_CPB_ARMPLL_B, "armpll-b", ARMPLL_B_CON0, ARMPLL_B_CON0, 0, 0,

	    PLL_AO, BIT(0), ARMPLL_B_CON1, 24, 0, 0, 0, ARMPLL_B_CON1, 0, 22),

};



static const struct mtk_pll_data cpu_ll_plls[] = {

	PLL(CLK_CPLL_ARMPLL_LL, "armpll-ll", ARMPLL_LL_CON0, ARMPLL_LL_CON0, 0,

	    0, PLL_AO, BIT(0), ARMPLL_LL_CON1, 24, 0, 0, 0, ARMPLL_LL_CON1, 0, 22),

};



static const struct mtk_pll_data cci_plls[] = {

	PLL(CLK_CCIPLL, "ccipll", CCIPLL_CON0, CCIPLL_CON0, 0, 0, PLL_AO,

	    BIT(0), CCIPLL_CON1, 24, 0, 0, 0, CCIPLL_CON1, 0, 22),

};



static const struct mtk_pll_data ptp_plls[] = {

	PLL(CLK_PTPPLL, "ptppll", PTPPLL_CON0, PTPPLL_CON0, 0, 0, PLL_AO,

	    BIT(0), PTPPLL_CON1, 24, 0, 0, 0, PTPPLL_CON1, 0, 22),

};



static const struct of_device_id of_match_clk_mt8196_mcu[] = {

	{ .compatible = "mediatek,mt8196-armpll-bl-pll-ctrl",

	  .data = &cpu_bl_plls },

	{ .compatible = "mediatek,mt8196-armpll-b-pll-ctrl",

	  .data = &cpu_b_plls },

	{ .compatible = "mediatek,mt8196-armpll-ll-pll-ctrl",

	  .data = &cpu_ll_plls },

	{ .compatible = "mediatek,mt8196-ccipll-pll-ctrl", .data = &cci_plls },

	{ .compatible = "mediatek,mt8196-ptppll-pll-ctrl", .data = &ptp_plls },

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(of, of_match_clk_mt8196_mcu);



static int clk_mt8196_mcu_probe(struct platform_device *pdev)

{

	const struct mtk_pll_data *plls;

	struct clk_hw_onecell_data *clk_data;

	struct device_node *node = pdev->dev.of_node;

	const int num_plls = 1;

	int r;



	plls = of_device_get_match_data(&pdev->dev);

	if (!plls)

		return -EINVAL;



	clk_data = mtk_alloc_clk_data(num_plls);

	if (!clk_data)

		return -ENOMEM;



	r = mtk_clk_register_plls(node, plls, num_plls, clk_data);

	if (r)

		goto free_clk_data;



	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);

	if (r)

		goto unregister_plls;



	platform_set_drvdata(pdev, clk_data);



	return r;



unregister_plls:

	mtk_clk_unregister_plls(plls, num_plls, clk_data);

free_clk_data:

	mtk_free_clk_data(clk_data);



	return r;

}



static void clk_mt8196_mcu_remove(struct platform_device *pdev)

{

	const struct mtk_pll_data *plls = of_device_get_match_data(&pdev->dev);

	struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);

	struct device_node *node = pdev->dev.of_node;



	of_clk_del_provider(node);

	mtk_clk_unregister_plls(plls, 1, clk_data);

	mtk_free_clk_data(clk_data);

}



static struct platform_driver clk_mt8196_mcu_drv = {

	.probe = clk_mt8196_mcu_probe,

	.remove = clk_mt8196_mcu_remove,

	.driver = {

		.name = "clk-mt8196-mcu",

		.of_match_table = of_match_clk_mt8196_mcu,

	},

};

module_platform_driver(clk_mt8196_mcu_drv);



MODULE_DESCRIPTION("MediaTek MT8196 mcusys clocks driver");

MODULE_LICENSE("GPL");